Hi,
I've been rendering FP Pro scenes in Arnold with no issues for months. I typically add the Noice DeNoiser as an Image Filter to Arnold to clean up my 3DS Max renders which produces dramatically cleaner renders. I've noticed, though, that when rendering FP Pro scenes the difference, when adding that DeNoiser, is not nearly as pronounced as non-FP Pro scenes. I wondered if FP Pro rendered objects somehow are not calculated by the Noice DeNoiser image filter in Arnold renders.